ASUS M3A32 MVP Deluxe and Vista lock up.

I just got this board and a new Phenom 9600 Black. I have 4 gb CRUCIAL ballistix tracer BL2KIT12864AL1065 ram and an ASUS (ATI)3850 video card. I have all the latest drivers for board and video card. Now for the issue. The system will run for 2 mins or 2 days and then just locks up. Does not matter what I am doing. Screen just goes all scrambled and locks hard. I have to reset the system and all is well for awhile. I have tried everything and not luck. The last item is to see if anyone knows what the bios should be set for the video card. The system was sent to me with the processor and ram installed, so i left the bios alone. I plan on swapping the card out for another one, but I don't have one to use right now. I'll have to buy another if the bios does not pan out. Thanks for the help in advance.